MARE SPAYING 



147 



Uterus — The uterus is a museulo-membranous sao situated partly in the 

 pelvic region. It consists of a body and two eornua. .Superiorly it is re- 

 lated to the rectum, which passes between its horns while it is suspended 

 laterally by the broad ligaments. Inferiorly it is related to the ))ladder and 

 convolutions of the intestines. Its anterior extremity is known as the 

 fundiis, and is continuous with the eornua. Its posterior extremity is con- 

 tinuous with the vagina, constituting the cervix or neck of the uterus. The 

 cervix is round, hard and thick. In its center is a tube-like opening (fis- 

 sure). The eornua spring laterally from the anterior extremity of 4he 

 uterus and pass upward and forward, and to these the suspensory liga- 

 ments are attached. At their summit the fallopian tubes enter. The uterus 



Fig. 132 — External and internal genital organs of the mare. B, Vagina; C. cervix 

 neck of womb) ; D, D, horns and fallopian tubes; E, B, ovaries; P, fundus. 



has three openings, viz: the ostium internum leading through the cer- 

 vix, and the ostium uterinum at the end of each horn. 



Fallopian ThSps— These are prolongations of the utertis, their purpose 

 being the conveying of the ovum from the ovaries to the uterus. They are 

 ten to twelve inches long and extend from the ovaries above to the eornua 

 below. At the upper outlet of the fallopian tubes is the fimbriated ex- 

 tremity, which is funnel-shaped and receives the ovum direct from the 



ovary. 



Ovaries — The ovaries are bean-shaped and weigh from one to three 

 ounces. They are situated in the sublumbar region of the abdominal cav- 



